Cleaner

A cleaner comprising:

• a body;
• a power supply received in the body and including:
• a first battery and a second battery;
• and
• a power supply circuit that selectively operates in a charge mode associated with receiving external power to recharge the first battery and the second battery or in a discharge mode associated with supplying stored power from the first battery and the second battery to a load;
• and
• a controller configured to manage the power supply,
• wherein the power supply circuit includes:
• a main switch that closes to connect the first battery and the second battery in series to each other in the discharge mode and opens to cause the first battery and the second battery to be connected in parallel to each other in the charge mode;
• a first switch that is closed in the charge mode to supply the external power to the first battery;
• and
• a second switch that is closed in the charge mode to supply the external power to the second battery, and
• wherein each of the first switch and the second switch includes a first N channel metal-oxide-semiconductor field-effect transistor (MOSFET) with a drain terminal connected to the first battery or the second battery, a second N channel MOSFET with a source terminal connected to a source terminal of the first N channel MOSFET and a drain terminal connected to the charging terminal, and a bipolar junction transistor (BJT) connected to gate terminals of the first N channel MOSFET and the second N channel MOSFET.

A cleaner comprising:

• a body;
• a power supply received in the body and including:
• a first battery and a second battery;
• and
• a power supply circuit that selectively operates in a charge mode associated with receiving external power to recharge the first battery and the second battery or in a discharge mode associated with supplying stored power from the first battery and the second battery to a load, the power supply circuit including:
• a main switch that closes to connect the first battery and the second battery in series to each other in the discharge mode and opens to cause the first battery and the second battery to be connected in parallel to each other in the charge mode;
• a first switch that is closed in the charge mode to supply the external power to the first battery;
• and
• a second switch that is closed in the charge mode to supply the external power to the second battery;
• one or more wheels to move the body along a surface;
• a height adjustor coupled to the body to raise or lower the body relative to the surface;
• and
• a controller configured to manage the power supply, and control the height adjustor to raise the body upward when the cleaner is docking on a charging stand that provides the external power.